GitLab

Improve the semantic intersection logic in URLPatternSet to utilize
URLPattern::CreateIntersection(). This allows callers to create an
intersection between two sets that will include patterns that were
not explicitly in either set, such as constructing the pattern
`http://chromium.org/*` from `http://*/*` and `*://chromium.org/*`.

Since not all callers may want this behavior, and in order to
introduce three separately named Create*Intersection methods in
URLPatternSet, add an enum, IntersectionBehavior, for callers to
specify the type of intersection behavior to use. This includes
string comparison (STL-set-style intersection), patterns explicitly
contained by both sets (the old semantic intersection), and detailed
(the new and improved semantic intersection).

Add unit tests for the same.

Bug: 867549

Change-Id: Ic80bec8c8c8bbac188efcf2862d92582379c5a7c
Reviewed-on: https://chromium-review.googlesource.com/1150919
Commit-Queue: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578731}